This post covers magnesium supplementation. Supplements can interact with medications and aren't right for everyone. If you're unsure whether any of these forms are appropriate for you, check in with your doctor or a qualified healthcare provider before starting.
Magnesium is one of those minerals that does a lot of quiet, essential work. Your cells need it to make energy. Different chemical pumps in the body rely on it. It helps stabilise membranes and supports muscle relaxation. And yet many of us are low in it — largely because a highly processed diet contains practically none.
The food-first approach is always the starting point. But sometimes — especially when access to good food sources is limited, or levels are genuinely depleted — supplementation becomes worth considering. The catch? "Magnesium" on a label doesn't tell you much. The form it's in changes everything about what it actually does for you.
The four main forms, and what they're each for
Magnesium Glycinate — for sleep, relaxation, and anxiety
This is the one most people mean when they talk about a magnesium supplement for winding down. Glycinate is magnesium bound to glycine — an amino acid that has its own calming properties. It may help with sleep, relaxation, and anxiety. Best taken in the evening or right before bed.
Magnesium Malate — for energy and muscle recovery
Malate is magnesium bound to malic acid, which plays a role in energy production. This makes it the more energising option — better suited to someone who wants support with energy production or muscle recovery. Best taken in the morning or before a workout, not at night.
Magnesium Citrate — for digestion, constipation, and bloating
Citrate is one of the most well-known forms and has a gentle effect on the digestive system. It may help with constipation and bloating. Best taken in the morning or before meals.
Magnesium L-Threonate — for focus, memory, and cognitive function
L-Threonate is the form most associated with brain health. It may help with focus, memory, and overall cognitive function. Best taken in the morning.
| Form | May help with | Best taken |
|---|---|---|
| Glycinate | Sleep, relaxation, anxiety | Evening / before bed |
| Malate | Energy production, muscle recovery | Morning / before a workout |
| Citrate | Digestion, constipation, bloating | Morning / before meals |
| L-Threonate | Focus, memory, cognitive function | Morning |
Getting magnesium from food first
Before reaching for a supplement, it's worth looking at what's already on your plate. These foods are naturally good sources of magnesium:
Where people go wrong
- Taking magnesium malate at night — it's energising, so it can actually disrupt sleep rather than support it.
- Grabbing whichever magnesium is cheapest without checking the form — the type matters more than the brand.
- Taking citrate specifically for sleep, when glycinate is the form better suited for that.
- Skipping food sources entirely and going straight to supplements — food first is still the best starting point.
- Expecting results overnight — like most minerals, magnesium builds up over time with consistent use.
Look at what you're currently taking or thinking about taking. Check the form on the label — does it match what you actually want support with? If you've been taking magnesium for sleep but the form is malate or citrate, that's a simple swap worth making: try glycinate in the evening instead and see how you feel after a week.